Choose hem thread by its construction, thickness, intended use and the machine’s threading instructions. “Serger thread” is not a single fiber or strength grade, and a cone is a package shape rather than a compatibility rule. General-purpose thread can be appropriate in an overlocker; some specialty textured threads have a different role from ordinary sewing thread.
Compare actual thread types
| Named thread | Manufacturer’s description | What to check for the hem |
|---|---|---|
| Gütermann Sew-all | General-purpose 100% polyester sewing thread | Suitable needle size and the machine’s thread delivery; useful for many utility-machine and hand-sewn hems |
| Gütermann Toldi-Lock | Polyester thread intended for overlock and coverlock machines | Exact machine path and thread setup; cone size and quantity |
| Gütermann Bulky-Lock 80 | Textured/bulk thread intended for soft serging and dense edge coverage on overlock/coverstitch machines | Manufacturer’s intended needle/looper use and the model’s instructions, rather than substituting it blindly into every path |
These examples are not a measured strength or stretch ranking. The stitch construction contributes to a hem’s stretch; a product marketed for an overlocker does not automatically give a domestic straight-stitch hem adequate elasticity.
Three hemming situations
For a woven trouser hem stitched on a utility machine, a suitable general-purpose thread is a reasonable starting point. Match its color and thickness to the cloth and needle, then assess the sample for visible stitching, puckering and drape. A fine hand blind hem may call for a different thread and needle than a visible topstitched hem.
For a folded jersey hem with zigzag or an approved twin needle, use the machine’s needle/thread directions and stretch the sample by the amount needed in wear. Do not treat “regular thread” as proof that a tight straight line will stretch enough. Twin-needle underside construction differs from a coverstitch machine’s looped finish.
For an overlocked rolled edge or a coverstitched hem, follow the exact model’s chart. The needle and looper threads need not be identical; a textured looper thread may be selected for coverage while a suitable smooth thread is used elsewhere. Do not generalize one brand’s instructions to every cone or overlocker.
Packaging and alteration are separate issues
A cone used on a utility machine may require an approved separate thread stand for proper delivery. A small spool may need the serger’s specified cap, holder or net. Check the model directions; packaging alone does not establish “serger only” or “regular machine only.”
A hem that may be let down later can be sewn with an accessible removable stitch and enough allowance. Its alteration potential is not determined by whether the thread came from a cone. Likewise, fusible hem tape is not always temporary: permanence, care and removal depend on the adhesive product and cloth.
Buying decision
For occasional utility-machine hems, begin with a documented general-purpose thread that suits the machine and fabric. Buy a dedicated overlock/coverlock thread when that product’s characteristics and package suit the actual operation. Compare usable length, number of paths and required colors before judging total cost; there is no universal economy winner here.
Search Amazon for Gütermann Sew-all · Search Amazon for Gütermann Toldi-Lock · Search Amazon for Gütermann Bulky-Lock 80 .
Sources
Gütermann Sew-all , Toldi-Lock product information and Bulky-Lock overlock/coverstitch information establish the named intended uses. Compatibility still follows the exact machine manual. No hem-strength, wash or elasticity trial was performed.